US20100030299A1 - Apparatus and method for the treatment of headache - Google Patents
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- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
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- A61N1/04—Electrodes
- A61N1/0404—Electrodes for external use
- A61N1/0408—Use-related aspects
- A61N1/0456—Specially adapted for transcutaneous electrical nerve stimulation [TENS]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/36014—External stimulators, e.g. with patch electrodes
- A61N1/36021—External stimulators, e.g. with patch electrodes for treatment of pain
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Abstract
A battery-operated transcutaneous electrical nerve stimulator (TENS) to treat headache pain in an abortive and/or preventive manner. The TENS unit and its electrodes are built into a unitary device which facilitates a self-administered treatment. In some embodiments, the pulses are monophasic. In other embodiments, pairs of biphasic pulses are provided, wherein each pair of biphasic pulses includes a first pulse having a first polarity separated by a gap in time from a second pulsed having an opposite polarity. In some embodiments, each pulse in each biphasic pair is of a duration equal to that of the other pulse of the pair. In some embodiments, the duration of each pulse is between about 50 microseconds and about 400 microseconds, and the gap in time between pulses of a pair is between about 50 and 100 microseconds.
Description
- This application is a continuation of International Patent Application No. PCT/US2008/060288, with an international filing date of Apr. 14, 2008 (International Publication No. WO 2008/128215, with a publication date of Oct. 23, 2008), which claimed priority to U.S. Provisional Patent Application No. 60/911,518 filed Apr. 13, 2007, titled “APPARATUS AND METHOD FOR THE TREATMENT OF HEADACHE,” each of which is incorporated herein by reference in its entirety.
- This invention relates to methods and apparatus for the treatment of headache and more specifically to a method and a portable, (e.g., battery-operated) transcutaneous electrical stimulation device for the treatment of headache.
- Headache is so common that it is often not regarded as a serious health issue. However, more than 45 million Americans suffer from headaches sever enough to seek medical help.
- A study published in the April 1999 issue of the Archives of Internal Medicine revealed that one single headache type, namely migraine, costs American employers $13 billion per year due to missed work and reduced productivity. In addition, according to the National Headache Foundation (NHF), approximately 157 million workdays are lost annually due to the pain and the associated symptoms of migraine. On top of the above mentioned economic impact, there are intangible costs, such the poor quality of life of these headache sufferers due to the time missed from their daily activities.
- The International Headache Society (IHS) classifies headache disorders into two main categories: primary and secondary. The main difference between these two categories is that the secondary type headaches are attributed to a particular cause. The twelve headache types within both categories are listed below in Table 1 and a more in detailed comparison of the first three primary headaches can be found in Table 2.
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TABLE 1 International classification of headache disorders Primary Headaches 1. Migraine 2. Tension-type headache (TTH) 3. Cluster headache 4. Other primary headaches Secondary Headaches 5. Headache attributed to head and/or neck trauma 6. Headache attributed to cranial or cervical vascular disorder 7. Headache attributed to non-vascular intracranial disorder 8. Headache attributed to a substance or its withdrawal 9. Headache attributed to infection 10. Headache attributed to disorder of homeostasis 11. Headache or facial pain attributed to disorder of cranium, neck, eyes, ears, nose, sinuses, teeth, mouth or other facial or cranial structures 12. Headache attributed to psychiatric disorder -
TABLE 2 Characteristics of Primary Headache Disorders Tension-Type Migraine Headache (TTH) Cluster Headache Location Unilateral Bilateral Strictly unilateral Intensity Moderate/severe Mild/moderate Severe Duration 4 to 72 hours Episodic: 30 15 to 90 min min to 7 days Sufferers 29.5 million 78% of adult One million in the U.S. population - Although the overall mechanisms and specific pathways responsible for primary and secondary headaches are still being elucidated, it is well known that many patients that experience these types of headaches often feel pain in both the front and the back of the head. While the front of the head is innervated, among others, by the ophthalmic branch of the trigeminal nerve, the back of the head is mainly innervated by spinal branches arising from C1 through C4, which are the first four cervical spinal nerves and which, among others, form the occipital and suboccipital nerves. However, recent studies suggest that there is a functional connection between the branches of the nervous system that innervate the front and the back of the head.
- The most commonly used treatment to mitigate headache pain is to date the pharmacological approach, which, depending on the particular drug, according to the American Council for Headache Education and to the National Guideline Clearinghouse (NGC) has various potential side effects. Some of these side effects include: fatigue, depression, nausea, insomnia, weight gain, constipation, dizziness, low blood pressure, gastrointestinal irritation, impaired platelet function, renal complications, analgesic rebound headache, and hepatic complications.
- Studies exploring alternative treatments for headaches have shown that electrically stimulating spinal nerve branches arising from between C1 through C4 provide an effective technique to mitigate several types of headaches. Electrostimulation of other sites in the head has also been successfully used to treat headaches. A study by Solomon et al. used high frequency (12 kHz to 20 kHz) electrostimulation in which one electrode was placed over the area of maximum pain and a second electrode on the opposite side of the head. In the same study, in cases where the pain was generalized, one electrode was placed in the occiput (back of the head) and another on the right hand. Solomon found that fifty-five percent (55%) of patients perceived an improvement a few minutes after the onset of the electrostimulation.
- In another study by Ahmed et al., percutaneous electrical nerve stimulation (PENS) was used to treat tension-type headache (TTH), migraine and posttraumatic headache (PTH); this study revealed that, regardless of the type of headache, pain was significantly mitigated; 58%, 58% and 52% in TTH, migraine, and PSH respectively. On top of the pain reduction, a reduction in the frequency of headaches was also observed.
- As mentioned above, electrostimulation of the spinal branches arising from C1 through C4 in the occipital and suboccipital region has proven to be effective in mitigating pain and reducing the frequency of occurrence of several types of headaches. However, the approach taken involves the chronic implantation of electrodes into the aforementioned anatomical region along with the implantation of a stimulating unit (sometimes referred to as an implantable pulse generator (IPG)), in a second location or in the same region (see U.S. Pat. No. 6,735,475, which is incorporated herein by reference) to produce the stimulating signal. Several scientific publications assess the effectiveness of this approach (e.g., Manjit et al., 2004; Popeney and Alo, 2003; Schwedt, et al., 2007a; Schwedt, et al., 2007b; Rodrigo-Royo et al., 2005). U.S. Pat. No. 4,856,526 and U.S. Pat. No. 4,627,438 to Liss et al., which are incorporated herein by reference, describe the approach by Solomon, which includes electrodes fixed to the head, with the inconvenience that cables running from the electrodes to the stimulation unit (pulse generator) are needed. In addition, fixing the electrodes, which are disposable, in place requires the use of non-permanent biocompatible conductive glue.
- In the PENS approach, needles have to protrude and penetrate the skin in specific locations and at specific depths, which renders a self treating paradigm nearly impossible. In addition, the PENS approach requires a skilled and well trained person to position the needles. On top of that, cables need to be used to connect the needles to the stimulator unit and the needles are disposable (typically not reusable, or they must be sterilized between uses, adding expense to the use of the PENS approach).
- As stated above, although chronic implantation of a stimulator unit and electrodes to treat headaches mitigates pain and disability in most patients, it has the caveat that the patient must undergo a surgical procedure and be left with at least one foreign body chronically implanted. This approach might be acceptable for and by a subpopulation of patients with severe and quasi permanent debilitating headaches; however, the majority of those suffering from debilitating headaches suffer them on average once a month.
- Other non-specific approaches such as the one suggested in U.S. Patent Application Publication Number U.S. 2006/0173510 (which is incorporated herein by reference), also has the inconvenience that electrodes have to be fixed and cables have to be used to connect the electrodes to the stimulating unit.
- U.S. Pat. No. 5,078,928 (hereinafter, “Balster et al.”), titled “COATING PROCESS FOR MANUFACTURING ENLARGED SMOOTH TEETH ENDS ON COMB”, issued Jan. 7, 1992, describes a process that could be used to manufacture smooth, comb-like electrodes, and is incorporated herein by reference. Balster et al. describe a process for permanently attaching smooth-finished globules of coating material to the ends of the teeth of molded plastic combs, picks, lifts and the like, including roughening or oxidizing the teeth ends to remove the gloss finish and form a more adherent surface; dipping the roughened teeth ends into a bath of liquid coating material to attach a globule of coating material to each tooth end and cover the sharp mold-parting line located thereat; and drying the globules attached to the teeth ends.
- Clearly, the majority of the patient population suffering from headaches would benefit from, and what is needed are a self-contained (i.e., one piece with no interconnecting cables and/or wires) portable device and a side-effect-free (e.g., non-pharmaceutical) yet effective non-invasive treatment method that could be self administered via the self-contained portable device that can be used in both preventative and abortive ways. This invention discloses such a device and method.
- The invention herein disclosed describes a non invasive apparatus and method for the acute treatment of primary and secondary type headaches via transcutaneous electrostimulation of the spinal nerve branches and/or sub branches and/or any of their combinations such as those arising from C1 through C4, including, but not limited to, the right and/or left suboccipital nerve(s), the right and/or left greater occipital nerve(s), the right and/or left least (third) occipital nerve(s), the right and/or left lesser occipital nerve(s), the right and/or left great auricular nerve(s).
- In some embodiments, the apparatus includes a device where the stimulating electrodes and the stimulator are integrated into a single handheld battery-operated transcutaneous electrical nerve stimulating (TENS) device. The aforementioned TENS device can be, but does not have to be, operated by the patient himself or herself.
- In some embodiments, the apparatus includes a device where the stimulating electrodes and the stimulator are integrated into a single hands-free battery-operated transcutaneous electrical nerve stimulating (TENS) device. In some such embodiments, the patient is free to move and his/her hands are free to do other tasks while the stimulation is being applied. The aforementioned TENS device can be, but does not have to be, operated by the patient himself or herself.
- In some embodiments, the apparatus includes a device where the stimulating electrodes and the stimulator are integrated into a single handheld battery-operated transcutaneous electrical nerve stimulating (TENS) device, which can be worn on the hand and/or wrist of the patient. In some such embodiments, the electrodes are located at the tip of the fingers on a glove-like garment which extends toward the wrist where the control box is strapped in a fashion similar to how a wrist watch is strapped.
- In some embodiments, the stimulation is applied by making contact between the electrodes and the area of the head where the above-mentioned nerves are located. Once the electrodes are correctly positioned, the TENS device or the electrodes are moved (by moving the hand of the person administering the therapy) without losing contact between the electrodes and the body, so that electrical stimulation is applied to the area and its surroundings.
- In some embodiments, the stimulation is applied by securing the entire device to the head of the patient (rendering a hands-free, free-to-move operation) making contact between the electrodes and the area of the head where the above-mentioned nerves are located. In some such embodiments, since the patient is free to move and hands-free, he/she could be simultaneously performing many other regular tasks.
- In some embodiments, in order to make stimulation more efficient, conductive gel is applied between the device and the treated area.
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FIG. 1A is a lateral-view perspective drawing of aTENS device 100. -
FIG. 1B is an anterior-view perspective drawing ofTENS device 100. -
FIG. 1C is a posterior-view perspective drawing ofTENS device 100 with itsback lid 140 open. -
FIG. 1D is a lateral-view perspective drawing of aTENS device 101 having comb-like electrodes. -
FIG. 1E is a lateral-view perspective drawing of aTENS device 102 having a two-row comb-like structure. -
FIG. 1F is a bottom-view perspective drawing of theTENS device 102 ofFIG. 1E . -
FIG. 1G is a lateral-view perspective drawing of aTENS device 103 having a single-sided comb-like structure. -
FIG. 2 is a perspective drawing of the anatomy of the back of the head of a patient 99 showing different nervous structures. -
FIG. 3 is a block diagram of the monophasicelectronic circuit 300 used in some embodiments. -
FIG. 4 is a block diagram of aTENS device 400. -
FIG. 5A is drawing of a hands-free embodiment as it is applied on the head of apatient 99. -
FIG. 5B is drawing of a hands-free embodiment 500. -
FIG. 5C is a drawing of a detachable portion (electrodes-control-box ensemble 590) of the hands-free embodiment 500. -
FIG. 5D is a posterior drawing of the head-band 580. -
FIG. 5E is an anterior drawing of the head-band 580. -
FIG. 5F is a drawing depicting the extreme positions ofelectrode handle 595. -
FIG. 6 (composed ofFIGS. 6A , 6B, and 6D) are drawings of the control box. -
FIG. 7A is a block diagram of the biphasicelectronic circuit 700 used in some embodiments. -
FIG. 7B is a block diagram of the biphasic electronic circuit 701 used in some embodiments. -
FIG. 8 is a partial block diagram of some embodiments ofcircuits monostable circuit 810 is used as atherapy timer 810. -
FIG. 9A is a drawing of a glove-TENS embodiment 900. -
FIG. 9B is a drawing of a glove-TENS embodiment 902 having comb-like electrodes. -
FIG. 9C is a drawing of a glove-TENS embodiment 903 having comb-like electrodes. -
FIG. 10 is a diagram of a spaced biphasic pulse stream 1000. -
FIG. 11 is a diagram of an alternating spaced biphasic pulse stream 1100. -
FIG. 12 is a diagram of an alternating unspaced biphasic pulse stream 1200. -
FIG. 13 is a diagram of a monophasic pulse stream 1300. -
FIG. 14 is a voltage-versus-time graph of a spaced biphasic pulse stream 1400 with plural sub-pulses. - Although the following detailed description contains many specifics for the purpose of illustration, a person of ordinary skill in the art will appreciate that many variations and alterations to the following details are within the scope of the invention. Accordingly, the following preferred embodiments of the invention are set forth without any loss of generality to, and without imposing limitations upon the claimed invention.
- In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration specific embodiments in which the invention may be practiced. It is understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention.
- The leading digit(s) of reference numbers appearing in the Figures generally corresponds to the Figure number in which that component is first introduced, such that the same reference number is used throughout to refer to an identical component which appears in multiple Figures.
- As stated in the background section, currently used devices and methods to treat headaches via electrostimulation are not ideal to treat the majority of the patient population suffering from headaches. In several of the cases, electrodes are flat, have to be fixed using adhesive, and connected via cables/wires to the pulse generator or electrostimulator. Furthermore, in some of these cases the electrodes are percutaneous needles which need to be placed by a well-trained person. In other cases, the patient needs to undergo surgery to be chronically implanted with the stimulating electrodes and their accompanying stimulating unit (sometimes referred to as an implantable pulse generator or IPG).
- In contrast, one embodiment of the present invention provides a non-invasive handheld device with a plurality of protruding electrodes, which are suited to go through the hair of the patient, and additionally, the device can be used by a patient to self-administer treatment.
- In another embodiment, the present invention provides a non-invasive hands-free device with one or more protruding electrodes, which are suited to go through the hair of the patient, and additionally, the device can be used by a patient to self-administer treatment.
- In some embodiments, the present invention provides a transcutaneous electrical nerve stimulator (TENS) having a plurality of electrodes in which the stimulator and the plurality of electrodes are incorporated into a unitary device. As used herein, the term unitary device means a device having support for both the stimulator electronics and power supply and for the plurality of electrodes. For example, in some embodiments, a unitary device includes a comb-like device having a self-contained power supply (e.g., a battery) and electronics (e.g., the stimulator circuit) along with electrodes configured in one or more comb-like structures. In some such embodiments, the electrodes are manufactured according to method such as a modified version of the method of Balster et al. (U.S. Pat. No. 5,078,928, which is incorporated herein by reference), wherein the comb's teeth tips are coated with an electrically conductive smooth material such as conductive epoxy and/or are plated or otherwise coated with one or more metals such as nickel plated on a copper adhesion layer, and optionally coated with a hypoallergenic metal such as gold or platinum or the like. In some embodiments, a metal layer extends from the tips of some of the teeth (e.g., the half of the teeth at a distal end of the comb) to one or more contact points used to connect to the stimulator electronics, and another metal layer extends from the tips of others of the teeth (e.g., the half of the teeth at a proximate end of the comb) to one or more other contact points used to connect to the stimulator electronics. In other embodiments, a unitary device includes a headband-like device having a self-contained power supply (e.g., a battery) and electronics (e.g., the stimulator circuit) along with electrodes configured in one or more finger-like structures. In yet other embodiments, a unitary device includes a glove-like device having a self-contained power supply (e.g., a battery) and electronics (e.g., the stimulator circuit) along with electrodes configured in one or more protruding structures on the palm or fingers of the glove. In some embodiments, a unitary device does not use exposed or external wires. In some embodiments, a unitary device does not separate the power supply (e.g., a battery), electronics (e.g., the stimulator circuit), and electrodes into two or more separate sections connected to one another by wires or cables. In some embodiments, a unitary device facilitates a self-administered treatment by the patient.
- In other embodiments, the present invention provides a transcutaneous electrical nerve stimulator (TENS) having a plurality of electrodes in which the stimulator and the plurality of electrodes are incorporated into a multi-portion device with the portions connected to one another by cables, wires, or the like. In some embodiments, separate devices are defined as two or more devices, wherein each device has their own separate support. For example, in some embodiments, the stimulator is connected to the plurality of electrodes via at least one electrical lead.
- In some embodiments, each one of one plurality of electrodes (e.g., those electrodes in one ensemble of electrodes) is at least 0.1 millimeters apart from those of another plurality of electrodes (e.g., those electrodes in another ensemble of electrodes). In some embodiments, each one of first plurality of electrodes is at least 0.2 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least 0.5 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least 1 millimeter apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 2 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 5 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 10 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 20 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 50 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 100 millimeters apart from all the electrodes in the second plurality of electrodes. In some embodiments, each one of the first plurality of electrodes is at least about 200 millimeters apart from all the electrodes in the second plurality of electrodes.
- In some embodiments, the plurality of electrodes is configured such that at least two electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least three electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least four electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least five electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least six electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least seven electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least eight electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least nine electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least ten electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least fifteen electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that at least twenty electrodes touch a patient's skin simultaneously. In some embodiments, the plurality of electrodes is configured such that more than twenty electrodes touch a patient's skin simultaneously.
- In some embodiments, the plurality of electrodes includes at least two electrodes. In some embodiments, the plurality of electrodes includes at least five electrodes. In some embodiments, the plurality of electrodes includes at least ten electrodes. In some embodiments, the plurality of electrodes includes at least twenty electrodes. In some embodiments, the plurality of electrodes includes more than twenty electrodes.
- In some embodiments, each one of a plurality of electrodes has a cylindrical or comb-tooth shape. In some embodiments, each one of a plurality of electrodes has a pyramidal shape. In some embodiments, each one of a plurality of electrodes has a prism shape (e.g., polygonal or like shape in cross section and having a constant or tapered shape across a length of the prism). In some embodiments, each one of a plurality of electrodes has a cylindrical shape (e.g., cylindrical, oval or like shape in cross section and having a constant or tapered shape across a length of the tooth).
- Having the electrodes protrude or extend to a length in the manner of the teeth of a comb facilitates placing or combing the electrodes through the hair so each one of a plurality of the electrodes reach the scalp or skin under the hair. In some embodiments, each one of the plurality of electrodes has a length and a cross-sectional diameter wherein the length is at least one-half times (0.5×) the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length and a cross-sectional diameter wherein the length is at least one times (1×) the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length and a cross-sectional diameter wherein the length is at least about two times (2×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is at least about three times (3×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is at least about four times (4×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is at least about five times (5×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is at least about ten times (10×) greater than the cross-sectional diameter.
- In some embodiments, each one of the plurality of electrodes has a length and a cross-sectional diameter wherein the length is about one-half times (0.5×) the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length and a cross-sectional diameter wherein the length is about one times (1×) the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length and a cross-sectional diameter wherein the length is about two times (2×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is about three times (3×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is about four times (4×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is about five times (5×) greater than the cross-sectional diameter. In some embodiments, each one of a plurality of electrodes has a length that is about ten times (10×) greater than the cross-sectional diameter.
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FIG. 1A is a lateral-view perspective drawing of a handheld TENS device 100 (seeFIGS. 1B and 1C for anterior and posterior views, respectively, of device 100). In some embodiments,device 100 includes a physically non-invasive transcutaneous electrical nerve stimulator (TENS) having one or more electrodes, in which the stimulator and the one or more electrodes are incorporated into a single, self-contained,handheld device 100 that is battery operated. In some embodiments,device 100 includes ahandheld case 150, atop electrode ensemble 112, abottom electrode ensemble 114, anelectronic circuit 160, abattery holder 170, one ormore batteries 159, and, in some embodiments, controls 180 including, e.g., an ON/OFF switch 182, atherapy selector knob 184, and anintensity selector knob 186. -
FIG. 1D is a lateral-view perspective drawing of ahandheld TENS device 101 havingelectrode ensembles electrode ensemble 112 is electrically connected tocircuitry 160, e.g., by wires or a plated-metal layer (e.g., in some embodiments, a nickel plating on a vanadium or copper adhesion layer formed on the polymer comb structure, wherein, in some embodiments, the tips are then plated or otherwise coated with a hypoallergenic metal that is compatible with skin contact, such as gold or platinum, and wherein an insulating layer is then deposited over the metal layers except for the tips, which are left un-insulated so that they easily conduct electricity to the skin during therapy). In some embodiments,circuit 160 includes two output conductors, one of which is connected to the teeth ofelectrode ensemble 112, and the other of which is connected to the teeth ofelectrode ensemble 114. -
FIG. 1E is a lateral-view perspective drawing of aTENS device 102 having a pair of spaced-apart rows of comb-like electrodes in rows orensembles -
FIG. 1F is a bottom-view perspective drawing of theTENS device 102 ofFIG. 1E . In some embodiments, a first comb-like structure 132 is metallized (or otherwise made of or coated with an electrically conductive material such as conductive epoxy), and then coated with in insulator (such as apolymer layer 142 leaving the conductive and/or metallizedtips 152 exposed. Similarly, in some embodiments, a second comb-like structure 134 is metallized (or otherwise made of or coated with an electrically conductive material such as conductive epoxy), and then coated with in insulator (such as apolymer layer 144 leaving the conductive and/or metallizedtips 154 exposed. In some embodiments, theenclosure 150 is sandwiched between comb-like structures first electrode ensemble 112 and to asecond electrode ensemble 114. In some embodiments,enclosure 150 holds anelectronic circuit 160, abattery holder 170, one or more batteries 159 (such as shown inFIG. 1B ), and, in some embodiments, presents one ormore controls 180 including, e.g., an ON/OFF switch, atherapy selector knob 184, and anintensity selector knob 186. In some embodiments,electronics circuit 160 is electrically connected tofirst electrode ensemble 112 andsecond electrode ensemble 114 by electrical conductors (e.g., plated layers of metal or electrical wires, or conductive epoxy, which in some embodiments, are coated with an insulating layer such as a conformal polymer) within the dual-row comb-like structures 131. -
FIG. 1G is a lateral-view perspective drawing of aTENS device 103 having a single-row comb-like structure 133, whereinfirst electrode ensemble 112 is formed from the teeth on the far end of the comb relative to the handle, andsecond electrode ensemble 114 is formed from the teeth on the end proximal to thehandle 136. In some embodiments, thebattery 159 and electronics circuit 160 (such as shown inFIG. 1B ), are held withinhandle 136, andelectronics circuit 160 is electrically connected tofirst electrode ensemble 112 andsecond electrode ensemble 114 by electrical conductors (e.g., plated layers of metal or electrical wires, or conductive epoxy) within the single-row comb-like structure 133. - In many cases, the muscle tissue of the patient is closer to the skin than are the nerves to which it is desired for the
therapy device 100 to stimulate (this also applies todevices device 100 are made short enough to substantially avoid stimulating the muscles to contract while being long enough to stimulate the nerves (e.g., in some embodiments, each pulse of a plurality of pulses has a non-zero duration at most 400 microseconds, while in other embodiments, each pulse is at most 300 microseconds, each pulse is at most 250 microseconds, each pulse is at most 200 microseconds, each pulse is at most 150 microseconds, each pulse is at most 300 microseconds, each pulse is at most 100 microseconds, each pulse is at most 75 microseconds, or each pulse is at most 50 microseconds). Using such short pulses is generally sufficient to reduce or eliminate muscle stimulation, however, to then obtain successful nerve stimulation with the short pulses, the voltage and/or current of the pulses is increased. Further, in order to balance the charge injected into the nerves and tissue and to avoid skin irritation from charge imbalance, each pulse of one polarity is followed a short time later by a pulse of the opposite polarity (e.g., in some embodiments, a positive (or negative) pulse (e.g., with a pulse width (duration) of between about 50 microseconds and about 400 microseconds, in some embodiments) is transmitted, and after a short delay of, e.g., between about 50 microseconds and about 100 microseconds, a negative (or positive) pulse (e.g., with a pulse width (duration) of approximately the same duration as the positive pulse, in some embodiments) is transmitted. In some embodiments, the short delay between the two pulses of a pair of opposite-polarity pulses is thought to give the first pulse time to take effect before the charge-balancing second pulse is sent. In other embodiments, the charge-balancing second pulse is sent with no delay after the first pulse, such as shown inFIG. 12 . - In some embodiments, the present invention includes TENS device 100 (see
FIG. 1A ,FIG. 1B , andFIG. 1C ), 101 (seeFIG. 1D ), 102 (seeFIG. 1E andFIG. 1F ), 103 (seeFIG. 1G ), 500 (seeFIGS. 5A , 5B, 5C, 5D, 5E, 5F andFIGS. 6A , 6B, 6C, and 6D) and/or 900 (seeFIG. 9 ) and methods for using the device to treat primary and secondary headache via transcutaneous (thus non-invasive) electrical stimulation of the spinal nerve branches and/or sub branches and/or any of their combinations arising from C1 through C4 (seeFIG. 2 ), including, but not limited to, the right and/or left suboccipital nerve(s) 205, the right and/or left greater occipital nerve(s) 210, the right and/or left least (third) occipital nerve(s) 220, the right and/or left lesser occipital nerve(s) 230, the right and/or left great auricular nerve(s) 240. -
FIG. 5A is a drawing of a hands-free TENS device 500 placed on the head of a patient 99 (seeFIG. 5B for a depiction ofdevice 500 alone). In some embodiments, theTENS device 500 includes acontrol case 510 with anelectronic circuit 630 and a battery holder 640 (seeFIG. 6 ), a righttop electrode ensemble 550, a rightbottom electrode ensemble 552, a lefttop electrode ensemble 551, a leftbottom electrode ensemble 553 anenclosure 510, and controls including a timed therapy-start push-button 530, a therapy selector knob (not shown), anintensity selector knob 520, a master ON/OFF switch (not shown), aplastic connector 560 that holds together all of the above-mentioned electrode assemblies and thecontrol box 510. In addition, in some embodiments,device 500 has a head-band 580 onto which theplastic connector 560 and what is attached to it can be incorporated forming a single functional unit. In some embodiments, the head-band 580 also has astrap 570 which can be used to secure thedevice 500 to the head of thepatient 99. Also, in some embodiments tension straps 540 are used to tension the electrodes against the head of the patient. -
FIG. 6 , which is composed ofFIG. 6A ,FIG. 6B ,FIG. 6C , andFIG. 6D ) are perspective views of the battery-and-electronics holder 600 used for some embodiments ofcase 510 for theheadband device 500 ofFIG. 5A andFIG. 5B . - In some embodiments in order to facilitate the cleaning of the
device 500, the head-band 580 and the electrodes-control-box ensemble 590 (seeFIG. 5C ) can be detached and reattached by using Velcro® strips 582 (or like attachment means) and/or metal or plastic pins 585 (seeFIGS. 5D-5E ). In some embodiments the head-band 580 can be washed in a regular washing machine used for clothing. - In some embodiments of
device 500, in order to facilitate the placement of the electrodes, theelectrode ensembles FIG. 5F ). - In some embodiments,
device 500 includes a transcutaneous electrical nerve stimulator (TENS) having a plurality of electrodes, wherein the stimulator and the plurality of electrodes are incorporated into a single, self-containeddevice 500 that is battery operated and hands-free to operate. -
FIG. 9A is a drawing of a glove-TENS embodiment 900. In some embodiments ofdevice 900, thecontrol box 910 contains the same electronics asdevice 500. In some embodiments ofdevice 900, anLED 920 turns ON when the device is ON. In some embodiments ofdevice 900, the therapy is applied as follows: the stimulation frequencies are selected with the therapy-selector knob 930, and then the device is turned ON via aswitch 901. In some embodiments, to start the therapy, apush button 950 is pressed. In some embodiments, theelectrodes intensity adjustment knob 940. In some embodiments ofdevice 900, the electrodes are connected to thecontrol box 910 via small metal strips that are embedded into theglobe 905. In some embodiments ofdevice 900, two electrodes are connected to the same polarity; for example, in oneembodiment electrodes electrode ensemble 112 ofFIG. 1A orFIG. 1E , whileelectrodes 915 correspond toelectrode ensemble 114 ofFIG. 1A orFIG. 1E , and therefore, the current flows betweenelectrodes electrode 915. Other combinations are possible (such as electrically connecting 916 and 915 for one set of electrodes (e.g., corresponding to ensemble 112) and using 917 for the other set of electrodes (e.g., corresponding to ensemble 114), or such as electrically connecting 917 and 915 for one set of electrodes (e.g., corresponding to ensemble 112) and using 916 for the other set of electrodes (e.g., corresponding to ensemble 114)), and are contemplated for other embodiments. -
FIG. 9B is a drawing of another glove-TENS embodiment 902 having comb-like electrodes 907, 908, and 909 that are configured to separate the hair on the patient's head in order to make easy contact to the scalp under the hair of the patient. In some embodiments,controller 910 is attached usingelectrical conductors 921 and 922 (e.g., insulated wires, in some embodiments,) to two or more sets of electrodes 907, 908, and 909, and is controlled bycontrol knob 930,control knob 940, start-therapy button 950, ON-OFF button 901 which, when ON, activatesLED 920. -
FIG. 9C is a drawing of a still another fingerless glove-TENS embodiment 903 having comb-like electrodes device 903 to the location that feels the best or is most effective at relieving pain. In some embodiments,controller 910 is attached usingelectrical conductors 921 and 922 (e.g., insulated wires, in some embodiments,) to two or more sets ofelectrodes control knob 930,control knob 940, start-therapy button 950, ON-OFF button 901 which when ON activatesLED 920. - In some embodiments, the stimulator of the
electronic circuits 300 and 700 (seeFIG. 3 ,FIG. 7A andFIG. 7B ) is divided into two main blocks: thepower supply 320 and thepulse generator 330. The power supply provides the electrical potential (i.e., current-limited voltage) needed to stimulate the desired bodily tissue. The electrical potential is supplied via an inductive based DC/DC boost converter 340, and controlled via avariable reference resistance 350 which is used to set the desired output voltage. In some embodiments, thereference resistance 350 is a potentiometer which is controlled by theintensity selector knob 186/520. In some embodiments, as a safety measure, the output current is limited to at most about 60 mA by a series resistance 360 (e.g., a resistance of about 2K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 50 mA by a series resistance 360 (e.g., a resistance of about 2.4K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 40 mA by a series resistance 360 (e.g., a resistance of about 3K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 30 mA by a series resistance 360 (e.g., a resistance of about 4K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 20 mA by a series resistance 360 (e.g., a resistance of about 6K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 10 mA by a series resistance 360 (e.g., a resistance of about 12K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 5 mA by a series resistance 360 (e.g., a resistance of about 24K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 2 mA by a series resistance 360 (e.g., a resistance of about 60K ohms with a voltage supply of about 120 volts). In some embodiments, as a safety measure, the output current is limited to at most about 1 mA by a series resistance 360 (e.g., a resistance of about 120K ohms with a voltage supply of about 120 volts). In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 200V (with an appropriate current-limiting resistance). In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 175V. In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 150V. In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 125V. In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 100V. In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 75V. In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 50V. In some embodiments, the circuit is configured to limit the maximum open-circuit output voltage to at most about 25V. The circuit configuration for some embodiments can be found in the applications report SLVA209 from Texas Instruments (www.ti.com), which is incorporated herein by reference. For example, in some embodiments, a Texas Instruments circuit model TPS61040 high-frequency boost converter and an external transistor (such as an N-channel Si9422 available from Visay or other companies) in cascade mode and other components in a configuration well known to those of skill in the art (such as shown in applications report SLVA209) are used to obtain an open-circuit voltage of approximately 120 volts. In other embodiments, any other suitable DC-DC converter or other power supply is used to obtain the high voltage ofcircuit 320. - In some embodiments, where a monophasic pulse is desired, the
pulse generator 330 includes aclock 370 and amonostable circuit 380. (In other embodiments (not shown, but in a manner similar to that shown inFIG. 7B ),pulse generator circuit 330 is implemented by a suitable microprocessor, which is configured to receive user input as to the pulse repetition rate, pulse width, intensity and the like, and programmed to substitute fortransistor 390 or output pulses to one or more external transistors 390 (as inFIG. 3 ) or 720/722/724 and 726/728/730 (as inFIG. 7B ).) In some embodiments, the frequency of theclock 370, which can vary from 50 Hz to 10 kHz, is set via an array ofresistors 352, (or other suitable means) wherein a particular resistor is selected by a multi-pole rotary switch attached to thetherapy selector knob 184 in device 100 (not shown for device 500), and thus the position of the multi-polerotary switch 351 is controlled by the therapy selector knob, 184 indevice 100, and by a similar therapy selector knob (not shown) indevice 500. The pulse width (PW) of the monostable 380 is set via another array ofresistors 353, however, in some embodiments, a particular resistor is also selected by the same multi-polerotary switch 351 attached to thetherapy selector knob 184 indevice 100, and by a similar therapy selector knob (not shown) indevice 500, and therefore, thetherapy selector knob 184 indevice 100, and by a similar therapy selector knob (not shown) indevice 500 controls both the PW of the monostable 380 and the frequency of theclock 370. In other embodiments the frequency and PW are selected independently via different selector knobs each one attached to a different multi-pole rotary switch. In one embodiment, a two-pole four-throw (i.e., four-position)rotary switch 351 is used such that pulse frequency and pulse width are both set for each of the four positions ofrotary switch 351 as follows: 50 Hz/100 μs, 200 Hz/75 μs, 3 kHz/50 μs, and 10 kHz/40 μs. In another embodiment a four-pole rotary or slide switch is used such that frequency and pulse width are for the four positions as follows: 50 Hz/50 μs, 200 Hz/50 μs, 3 kHz/50 μs, and 10 kHz/50 μs. In other embodiments other combinations such as 50 Hz/75 μs, 200 Hz/75 μs, 3 kHz/75 μs, and 10 kHz/75 μs or 50 Hz/100 μs, 200 Hz/100 μs, 3 kHz/100 μs, and 5 kHz/100 μs can be used. In yet other embodiments, other frequencies and/or pulse widths and their combinations can be used. - As used herein, a pulse stream is a series of pulses that are sent to two sets of electrodes, each set of electrodes having one or more electrodes in contact with spaced-apart locations on the patient's skin. As used herein, a monophasic pulse stream is one in which all or substantially of the pulses have a single polarity relative to ground (zero volts between the two sets of electrodes) or a high-impedance state (wherein one or both electrode ensembles is disconnected by a transistor in the OFF state) (see
FIG. 13 )). In contrast, as used herein, a biphasic pulse stream is one in which pulses extend in each of two polarities relative to a zero voltage (or high-impedance state) between the two sets of electrodes. As used herein, a multiphasic pulse stream is one in which pulses extend in each of two polarities relative to a zero voltage between pairs of sets of electrodes, wherein there are three or more sets of electrodes (essentially, this is a configuration using two or more biphasic pulse streams among three or more sets of electrodes). As used herein, a spaced-pair biphasic pulse stream is one in which pulses extend in each of two polarities relative to a zero voltage between the two sets of electrodes, and wherein there is a short period (e.g., 50 to 100 microseconds) of substantially zero voltage inserted between a positive pulse and a negative pulse (in some embodiments, the orientation of “positive” and “negative” depends on an arbitrary assignment of one set of electrodes (e.g., the second set) as the reference set, and the voltage applied to the first set of electrodes is positive, zero or negative relative to the second set, wherein the designation is arbitrary since the apparatus can be reversed in orientation relative to the patient's skin and the directions of polarities reverse). In contrast, as used herein, an unspaced-pair biphasic pulse stream is one in which pulses extend in each of two polarities relative to a zero voltage between the two sets of electrodes, and wherein there is no period of substantially zero voltage between a positive pulse and a negative pulse, but rather, the positive pulse is immediately followed by the negative pulse. An alternating spaced-pair biphasic pulse stream is one in which pulses extend in each of two polarities relative to a zero voltage between the two sets of electrodes, and wherein there is a short period (e.g., 50 to 100 microseconds) of substantially zero voltage inserted between a pulse of one polarity and the following opposite-polarity pulse, and wherein which polarity pulse is first alternates (seeFIG. 11 ). -
FIG. 7A is a schematic diagram of acircuit 700 according to some embodiments of the present invention.Circuit 700 is similar tocircuit 300 ofFIG. 3 , except thatpulse generator 330A outputs a positive-pulse-control signal 332 and a negative-pulse-control signal 333. -
FIG. 10 is a voltage-versus-time graph of a spaced biphasic pulse stream 1000. In the embodiment shown, the first pulse of each pair of pulses is a negative pulse (e.g., measured fromelectrode 114 toelectrode 112 ofFIG. 7A ), and is followed after a short delay by a positive pulse. In some embodiments, the pulse width of each positive pulse is approximately equal to the pulse width of the respective negative pulse, in order to balance the electrical charge at both electrodes and the tissue in between. In some embodiments (as shown). each of the plurality of pairs of pulses has substantially the same duration for all of the positive pulses and substantially the same duration for all of the negative pulses (e.g., in some embodiments, a first pair of pulses could have a 100-microsecond first pulse, a 75-microsecond gap, and a 100-microsecond second pulse, (a total of 275 microseconds for the pair of pulses) followed by a 725-microsecond gap to provide a 1 KHz pulse repetition rate, or by a 4725-microsecond gap to provide a 200 Hz pulse repetition rate, wherein this pattern repeats indefinitely for following pairs of pulses or until the device is shut off or automatically shuts off after a predetermined time). - In other embodiments, each of a plurality of pairs of pulses have different pulse durations (e.g., in some embodiments, a first pair of pulses could have a 100-microsecond first pulse, a 75-microsecond gap, and a 100-microsecond second pulse, (a total of 275 microseconds for the pair of pulses) followed by a 725-microsecond gap to provide a 1 KHz pulse repetition rate, or by a 4725-microsecond gap to provide a 200 Hz pulse repetition rate, but a second pair of pulses could have a 200-microsecond first pulse, a 75-microsecond gap, and a 200-microsecond second pulse, (a total of 475 microseconds for the pair of pulses) followed by a 525-microsecond gap to provide a 1 KHz pulse repetition rate, or by a 4525-microsecond gap to provide a 200 Hz pulse repetition rate, wherein this pattern repeats indefinitely for following sets of pairs of pulses, or wherein other pulse durations are used in other pairs of pulses, until the device is shut off or automatically shuts off after a predetermined time).
-
FIG. 11 is a voltage-versus-time graph of an alternating spaced biphasic pulse stream 1100. Note that in contrast to the pulse configuration ofFIG. 10 , the first pair of pulses inFIG. 11 has the positive pulse first followed by the negative pulse, the second pair of pulses inFIG. 11 has the negative pulse first followed by the positive pulse, the third pair of pulses inFIG. 11 has the positive pulse first followed by the negative pulse, and the fourth pair of pulses inFIG. 11 has the negative pulse first followed by the positive pulse. In other embodiments, other patterns of which pulse of a pair comes first are used. As withFIG. 10 , each pulse can have the same duration for an entire therapy session, or different pairs of pulses can each have different pulse durations. -
FIG. 12 is a voltage-versus-time graph of an alternating unspaced biphasic pulse stream 1200. This configuration of pulses is substantially the same as forFIG. 11 , except that there is no gap between the two pulses of each pair of pulses. Again, each of the pulses can have equal durations (e.g., in some embodiments, a first pair of pulses could have a 100-microsecond first pulse, no gap, and a 100-microsecond second pulse, (a total of 200 microseconds for the pair of pulses) followed by a 800-microsecond gap to provide a 1 KHz pulse repetition rate, or by a 4800-microsecond gap to provide a 200 Hz pulse repetition rate, wherein this pattern repeats indefinitely for following pairs of pulses or until the device is shut off or automatically shuts off after a predetermined time). In other embodiments, the pulses can have different durations during one therapy session. - Some embodiments providing the pulse stream of
FIG. 10 use the circuit ofFIG. 7A . Some embodiments providing the pulse stream ofFIG. 10 ,FIG. 11 ,FIG. 12 ,FIG. 13 orFIG. 14 use the circuit ofFIG. 7B . In some embodiments, the microprocessor circuit ofFIG. 7B provides any or all of the pulse sequences ofFIG. 10 ,FIG. 11 ,FIG. 12 ,FIG. 13 orFIG. 14 at different times. -
FIG. 13 is a voltage-versus-time graph of a monophasic pulse stream 1300. In the embodiment shown, a single polarity of pulses is used (such as provided bycircuit 300 ofFIG. 3 . -
FIG. 14 is a voltage-versus-time graph of a spaced biphasic pulse stream 1400 with plural sub-pulses. As shown, in some embodiments, one or more of the positive pulses and/or one or more of the negative pulses is composed of a plurality of sub-pulses (e.g., two negative pulses separated by a gap in time from one another followed by two positive pulses separated by a gap in time from one another; or (not shown) one negative pulse separated by a gap in time followed by two positive pulses separated by a gap in time from one another followed by another gap in time and another negative pulse). In some such embodiments, the first pulse of such a set is of a smaller amplitude and the first polarity, and the second pulse is of a higher amplitude (e.g., twice the amplitude of the first pulse) and also of the first polarity. In some such embodiments, the third pulse of such a set is of a smaller amplitude and the second opposite polarity, and the fourth pulse is of a higher amplitude (e.g., twice the amplitude of the third pulse) and also of the second polarity. In other such embodiments, the third pulse of such a set is of a much smaller amplitude and the second opposite polarity, and of a much longer duration, such that by its lower amplitude and longer duration, the third pulse balances the charge of the first and second pulses but its lower amplitude does not trigger an opposite-polarity artifact in the patient's tissue. - In some embodiments, where a monophasic pulse stream is desired, the
clock 370 triggers themonostable circuit 380, the output of themonostable circuit 380 drives pulse-control signal 331 to the gate of a field effect transistor (FET) 390, which is used to connect the bottom electrode ensemble(s) 114, 552, 553 to ground, therefore allowing current to pass between the top electrode ensemble(s) 112 550, 551, and the bottom electrode ensemble(s) 114, 552, 553. Hence, the pulse width (PW) of the stimulation signal follows the pulse width (PW) of themonostable circuit 380. - In yet other embodiments where a biphasic pulse is desired, referring to
FIG. 7A , the output of themonostable circuit 380 triggers a secondmonostable circuit 705 which in turn triggers a thirdmonostable circuit 710. The output of themonostable circuit 380 also drives the gates of two field effect transistors (FET) 722 and 720. The output of themonostable circuit 710 drives the gate of another two field effect transistors (FET) 728 and 730. TheFET 722 turns onFET 724 via an array ofresistors FET 724 andFET 720 are turned on, the first electrode ensemble(s) 112 (or 550, 551 inFIG. 5C ) are connected to the positive voltage and the second electrode ensemble(s) 114 (or 552, 553 inFIG. 5C ) are connected to ground (positive phase). TheFET 728 turns onFET 726 via and an array ofresistors FET 726 andFET 730 are turned on, the bottom electrode ensemble(s) 114, 552, 553 are connected to the positive voltage and the top electrode ensemble(s) 112, 550, 551 are connected to ground (negative phase). Themonostable circuit 705 generates an inter-pulse interval between the positive and the negative phase. In some biphasic embodiments, the elapsed time of themonostable circuits clock 370 can be modified through an array of resistors and rotary switches such as it is depicted inFIG. 3 byresistors microprocessor 330B as shown inFIG. 7B . - In some embodiments, the inter-pulse interval is not needed and therefore the
monostable circuit 705 is not needed, in this case, the output of themonostable circuit 380 directly triggers themonostable circuit 710. - In some embodiments, a
monostable circuit 810 acts as a timer such that when the output of thismonostable circuit 810 is ON the therapy is also ON, and it is turned OFF when the monostable pulse if over (seeFIG. 8 ). In this case, in some embodiments a push-button 820 can be used to trigger themonostable circuit 810. - In some embodiments, a microprocessor can be used to substitute all
monostable circuits clock 370. - Since the device delivers the stimulation transcutaneously and since the muscles are closer to the skin than nerves, the output of the TENS device is such that it minimizes muscle activation and maximizes nerve activation by taking advantage of the differences in the excitability properties (i.e., chronaxie τ and rehobase IRh) between muscle and nerve tissue. The excitation threshold (Ith) as a function of the pulse width (PW) for excitable tissue follows a hyperbolic function known as the strength-duration curve:
-
- In general both the τ and the IRh for muscle are bigger than those for nerve tissue and therefore a way to increase the difference between the Ith of muscle tissue and the Ith of nerve tissue is using short PW. The TENS device disclosed here uses short pulse widths (PWs; i.e., PW<400 microseconds).
- Since in some stimulation regions in the head it is likely that hair will be present, the portion of the electrode ensemble(s) 112, 552, 553, 114, 550, and 551 that makes contact with the body of the patient is shaped in the form of several separated
structures 112 and 114 (comb-like ensemble) to facilitating the displacement of hair thus maximizing skin-electrode contact. - In some embodiments, in the case of
device 100, the invention is carried out by putting conductive gel in the region of the head to be treated (seeFIG. 2 ), then, turning the TENS device ON (moving ON/OFF switch 182) and adjusting thetherapy selector knob 184 and the intensity selector knob 186 (actual adjustments are patient dependent). Once the intensity and the therapy have been selected, then theelectrode ensembles - In order to facilitate the contact between the
electrode ensembles electrode ensembles ensemble head 110, which can rotate on theshafts 122 and 124 (which connect to pivot assembly 120 of extension piece 116) to whichhead 110 is attached. - In some embodiments, in the case of
device 500, the invention is carried out by putting conductive gel in the region of the head to be treated (seeFIG. 2 ), then, securing the device on the patients head, turning the TENS device ON (moving/pressing ON/OFF switch 530) and adjusting the therapy selector knob (not shown) and the intensity selector knob 520 (actual adjustments are patient dependent). Once the intensity and the therapy have been selected, then the patient can perform his/her regular tasks while the treatment is ON. The therapy is administered to both sides simultaneously. The specific neural structures to be treated are stated above in this section. In some embodiments, by pressing thepush button 820 is pressed byswitch 530. By pressingpush button 820 the monostable 830 outputs a pulse of pre-determined duration. In turn, the monostable pulse turns on the therapy by enabling the DC/DC converter 340. Therefore, the monostable serves as a timer for the therapy, when the monostable pulse is ON the therapy is ON and when the monostable pulse is OFF then the therapy is OFF. In some embodiments, aside from theswitch 530 there is a general ON/OFF switch (not shown). - In some embodiments, the
electrode ensembles shafts - In some embodiments of the
device 100, thetop electrode ensemble 112, and thebottom electrode ensemble 114 are, electrically connected throughshaft 122 andshaft 124, respectively, via conductors (wire, cable, strip, etc.) buried in the electrode-ensemble head 110. Theshafts circuit board 160 through electrically conductive cables (not shown) that run insidepivot assembly 120 andextension piece 116 and under thebattery holder 170 to reach thecircuit board 160. - In some embodiments of the
device 100,pivot assembly 120 also includes a pressure-sensitive switch that disconnects the power toelectrodes device 100 and patient 99). - In some embodiments of the
device 100, a conductivity-gel applicator unit is attached to head 110, and which includes a button that, when pressed by the user, dispenses a small amount of gel through a hollow shaft that extends to the tip of each of one or more tines of electrode ensembles (combs) 112 and/or 114. This allows the user to directly apply a small but effective amount of conductive gel directly to the skin being contacted byelectrode ensembles - In some embodiments,
electrode ensembles - In other embodiments of the
device 100, theelectrode ensembles shafts ensemble head 110. - In other embodiments of the
device 100, theshafts circuit board 160, via metal strips that run inside theextension piece 116 and under thebattery holder 170 to reach thecircuit board 160. - In some embodiments of
device 500, theelectrode ensembles circuit board 630 insidecase 510 via conductors (wire, cable, strip, etc.) embedded into the aplastic connector 560. - In some embodiments of
device 500, theelectrode ensembles electrode ensembles electrode ensemble -
FIG. 4 is a block diagram of aTENS device 400 that, in some embodiments, optionally includes a power-supply disable (or enable) switch 430 (e.g., a spring loaded switch that enables the voltage supply when pressure is applied to pivot device 120 (i.e., when theelectrodes device 400 are pressed against the skin of the user). This saves battery power and eliminates any voltage to the electrodes when they are not firmly pressed against the user's skin. In some embodiments,device 400 also includes one or more conductive-gel reservoirs 423 (e.g., in some embodiments, the user pressesbutton 421 on swivelinghead 410, which applies pressure topistons 422 in cylinders 423 (e.g., similar to a syringe), and in turn dispenses gel throughcapillaries 424 that extend to the conductive ends of one or more insulative (e.g., plastic) tines of theelectrodes conductors 451 extend frompower supply 320 to the ends ofelectrodes 114, andconductors 452 extend fromelectronic pulse controller 330 to the ends ofelectrodes 112. The conductive gel provides a better electrical connection betweenelectrodes patient 99, and betweenelectrodes patient 99, and betweenelectrodes patient 99. - In some embodiments the conductive gel might be stored in a reservoir located elsewhere on the
TENS device 400 as a separate compartment or inside an existing one, for example inside theelectrode ensembles ensemble head 410 as shown. The conductive gel might be administered via delivery channels running through the electrode themselves by pressing a small lever. - In some embodiments the TENS device might be positioned on the head by attaching the electrodes and stimulator to the area to be treated. In some embodiments, the stimulation is carried out without the use of conductive gel.
- In some embodiments, the present invention provides a method for treating a headache of a patient, the method including providing a portable, transcutaneous electrical nerve stimulator (TENS) having a plurality of electrodes; receiving, by the TENS, an activation indication from the patient; and based on the activation indication, providing a plurality of electrical pulses from the TENS transcutaneously to the nerves of the patient in order to treat headache pain.
- In some embodiments, the providing of the TENS includes housing the TENS and the plurality of electrodes in a unitary device, wherein the device has no exposed wiring, and wherein the device facilitates a self-administered treatment by the patient.
- In some embodiments, the providing of the plurality of electrical pulses treats headache pain in an abortive manner. In other embodiments, the providing of the plurality of electrical pulses treats headache pain in a preventive manner.
- In some embodiments, the providing of the TENS includes providing a handheld device. In other embodiments, the providing of the TENS includes providing a hands-free device.
- In some embodiments, each one of the plurality of electrodes is at a distance from one another and configured such that at least two electrodes touch the patient's skin simultaneously.
- In some embodiments, the providing of the TENS includes providing a TENS that delivers pulses at one or more frequencies between about 40 Hz and about 10 kHz. In some embodiments, the providing of the plurality of electrical pulses includes providing pulses that are delivered at no more than 60 mA. In some embodiments, the providing of the plurality of electrical pulses includes providing pulses that are delivered at no more than 200 volts. In some embodiments, the providing of the plurality of electrical pulses includes providing electrical pulses having a pulse width that is equal or less than 400 micro seconds.
- In some embodiments, the providing of the plurality of electrical pulses includes stimulating at least one of the following nerve structures: the right and/or left greater occipital nerve(s), the right and/or left least (third) occipital nerve(s), the right and/or left lesser occipital nerve(s), the right and/or left great auricular nerve(s).
- In some embodiments, the method further includes applying a conductive gel from a reservoir within the device. In some embodiments, the method further includes releasing the conductive gel through one or more delivery channels built into at least one electrode.
- In some embodiments, each one of the plurality of electrodes are shaped and configured such that the plurality of electrodes facilitate contact between the plurality of electrodes and skin of the patient in bodily locations where hair impedes such contact. In some embodiments, each one of the plurality of electrodes has a comb-tooth shape to ensure that hair is combed out of the way as the patient moves the plurality of electrodes over the skin.
- In some embodiments, the method further includes supplying power to the TENS via a battery, wherein the battery is electrically connected to the TENS, and wherein the battery is housed within the unitary device. In other embodiments, the method further includes supplying power to the TENS via an external power supply that is electrically connected to the TENS.
- In some embodiments, the device is small enough that a person can carry it around comfortably. In some embodiments, the electrodes are not disposable and/or are reusable.
- In some embodiments, the plurality of electrodes is mounted in a device head that is configured to rotate to facilitate contact between the plurality of electrodes and skin of the patient.
- In some embodiments, each one of the plurality of electrodes is hollow, the method further comprising dispensing a conductive gel through each one of the plurality of hollow electrodes. In some embodiments, the method further includes disabling power to the plurality of electrodes if no pressure is applied to the head of the device, and enabling pulsed power to the plurality of electrodes if pressure is applied. In some embodiments, wherein the each one of the plurality of electrodes is hollow, the method further includes dispensing a conductive gel through each one of the plurality of hollow electrodes; and disabling power to each one of the plurality of hollow electrodes if no pressure is applied to the head of the device.
- In some embodiments, the method further includes electrically disconnecting the plurality of electrodes unless the device is pressed against a surface.
- In some embodiments, the present invention provides a method for treating a headache of a patient, the method including providing a portable, transcutaneous electrical nerve stimulator (TENS) having: a first plurality of non-invasive comb-like electrodes physically connected to a common electrode base and each electrically connected to a first signal output of the TENS, and a second plurality of non-invasive comb-like electrodes physically connected to the common electrode base, wherein the TENS is configured such that the first plurality of electrodes and the second plurality of electrodes can be simultaneously placed in contact with the patient's head, and wherein the second plurality of electrodes each electrically connected to a second signal output of the TENS; receiving, by the TENS, an activation indication; and based on the activation indication, providing a plurality of electrical pulses between the first signal output of the TENS and the second signal output of the TENS such that the electrical pulses are applied from both the first plurality of electrodes and the second plurality of electrodes transcutaneously to the patient's head to stimulate nerves of the patient in order to treat headache pain. In some embodiments, the providing of the TENS includes housing the TENS and the first and second plurality of electrodes in a unitary device, and wherein the device facilitates a self-administered treatment by the patient. In some embodiments, the providing of the plurality of electrical pulses treats headache pain in an abortive manner. In some embodiments, the providing of the plurality of electrical pulses treats headache pain in a preventive manner. In some embodiments, the providing of the plurality of electrical pulses includes providing biphasic substantially square pulses including a first plurality of pulses having a first polarity and a duration of no more than 400 microseconds and a second plurality of pulses having a second polarity, opposite the first polarity, and a duration of no more than 400 microseconds. In some embodiments, providing of the TENS includes providing a hands free device, and supporting the hands-free device on the patient's head. In some embodiments, the electrodes of the first plurality of electrodes are grouped into a first group, wherein the electrodes of the second plurality of electrodes are grouped into a second group, wherein the first group is located at a distance from the second group that is greater than a distance between any two adjacent electrodes in each group. In some embodiments, the providing of the TENS includes providing a TENS that delivers pulses at one or more pulse-repetition-rate frequencies of between about 40 Hz and about 10 kHz. In some embodiments, the providing of the plurality of electrical pulses includes providing pulses that are delivered at a non-zero current of no more than 60 mA. In some embodiments, the providing of the plurality of electrical pulses includes providing pulses that are delivered at a non-zero voltage of no more than 200 volts. In some embodiments, the providing of the plurality of electrical pulses includes providing electrical pulses having a non-zero pulse width that is equal or less than 400 microseconds. In some embodiments, the providing of the plurality of electrical pulses includes stimulating one or more of the nerve structures selected from the group consisting of the right greater occipital nerve, the left greater occipital nerve, the right least (third) occipital nerve, the left least (third) occipital nerve, the right lesser occipital nerve, the left lesser occipital nerve, the right great auricular nerve, and the left great auricular nerve.
- Some embodiments further include applying a conductive gel from a reservoir within the device. Some embodiments further include releasing the conductive gel through one or more delivery channels built into at least one electrode of the plurality of electrodes. In some embodiments, each one of the plurality of electrodes is hollow, the method further comprising dispensing a conductive gel through each one of the first and second plurality of hollow electrodes.
- In some embodiments, the first and second plurality of electrodes are shaped and configured to facilitate contact between the first and second plurality of electrodes and skin of the patient in bodily locations where hair would otherwise impede such contact. In some embodiments, each one of the first and second plurality of electrodes has a comb-tooth shape to ensure that hair is combed out of the way as the patient moves the plurality of electrodes over the skin. Some embodiments further include supplying power to the TENS via a battery, wherein the battery is electrically connected to the TENS, and wherein the battery is housed within the unitary device. Other embodiments further include supplying power to the TENS via an external power supply that is electrically connected to the TENS.
- In some embodiments, the device is small enough that a person can readily carry it around. In some embodiments, the plurality of electrodes is reusable. In some embodiments, the first and second pluralities of electrodes are mounted in a device head that is configured to rotate around a point or axis to facilitate contact between the first and second plurality of electrodes and skin of the patient.
- Some embodiments further include disabling power to the first and second plurality of electrodes if no pressure is applied to the head of the device, and enabling pulsed power to the first and second plurality of electrodes if pressure is applied. In some embodiments, each one of the first and second plurality of electrodes is hollow, and the method further includes dispensing a conductive gel through each one of the first and second plurality of hollow electrodes; and disabling power to each one of the first and second plurality of hollow electrodes if no pressure is applied to the head of the device.
- Some embodiments include electrically disconnecting the first and second plurality of electrodes unless the device is pressed against a surface. In some embodiments, the providing of the plurality of electrical pulses includes providing substantially square, alternating-spaced-biphasic pulses including a first plurality of pulses having a first polarity and a duration of no more than 200 microseconds and a second plurality of pulses having a second polarity, opposite the first polarity, and a duration of no more than 200 microseconds.
- In some embodiments, the present invention provides an apparatus for treating a headache of a patient that includes a portable, transcutaneous electrical nerve stimulator (TENS) having a common electrode base; a first plurality of non-invasive comb-like electrodes physically connected to the common electrode base and each electrically connected to a first signal output of the TENS, and a second plurality of non-invasive comb-like electrodes physically connected to the common electrode base, wherein the TENS is configured such that the first plurality of electrodes and the second plurality of electrodes can be simultaneously placed in contact with the patient's head, and wherein the second plurality of electrodes are each electrically connected to a second signal output of the TENS, wherein the TENS presents a plurality of electrical pulses between the first signal output of the TENS and the second signal output of the TENS such that the electrical pulses are applied from both the first plurality of electrodes and the second plurality of electrodes transcutaneously to the patient's head to stimulate nerves of the patient, in order to treat headache pain. In some embodiments, the TENS unit and the first and second plurality of electrodes are housed in a unitary device, wherein the device has no exposed wiring, and wherein the device facilitates a self-administered treatment by the patient. In some embodiments, the TENS is configured to treat headache pain in an abortive manner. In some embodiments, the TENS is configured to treat headache pain in a preventive manner. In some embodiments, the TENS is configured to output a plurality of electrical biphasic substantially square pulses including a first plurality of pulses having a first polarity and a duration of no more than 400 microseconds and a second plurality of pulses having a second polarity, opposite the first polarity, and a duration of no more than 400 microseconds. In some embodiments, the TENS is a hands-free device. In some embodiments, the electrodes of the first plurality of electrodes are grouped into a first group, wherein the electrodes of the second plurality of electrodes are grouped into a second group, wherein the first group and the second group are located at a distance from one another that is greater than a distance between any two adjacent electrodes in each group. In some embodiments, the TENS delivers pulses at one or more frequencies between about 40 Hz and about 10 kHz. In some embodiments, the plurality of electrical pulses is delivered at no more than 60 mA. In some embodiments, the plurality of electrical pulses is delivered at no more than 200 volts. In some embodiments, the pulse width of each one of the plurality of electrical pulses is equal or less than 400 microseconds. In some embodiments, the plurality of electrical pulses stimulate one or more of the nerve structures selected from the group consisting of the right greater occipital nerve, the left greater occipital nerve, the right least (third) occipital nerve, the left least (third) occipital nerve, the right lesser occipital nerve, the left lesser occipital nerve, the right great auricular nerve, and the left great auricular nerve. Some embodiments further include a conductive gel applicator that selectively dispenses gel from a reservoir within the handheld device. Some embodiments further include one or more delivery channels built into at least one of the second plurality of electrodes and operatively connected to the reservoir. In some embodiments, the first and second plurality of electrodes are shaped and configured to facilitate contact between the first and second plurality of electrodes and skin of the patient in bodily locations where hair would otherwise impede such contact. In some embodiments, each one of the first and second plurality of electrodes has a comb-tooth shape to ensure that hair is combed out of the way as the patient moves the plurality of electrodes over the skin. Some embodiments further include a battery electrically connected to the TENS and housed within the unitary device. Other embodiments include an external power supply electrically connected to the TENS. In some embodiments, the device is small enough that a person can carry it around comfortably. In some embodiments, the first and second plurality of electrodes are not disposable. In some embodiments, the first and second plurality of electrodes are mounted in a head that is configured to rotate to facilitate contact between the first and second plurality of electrodes and skin of the patient. In some embodiments, the TENS is configured to output a plurality of spaced biphasic electrical pulses including a plurality of pairs of pulses, each pair of pulses including a first pulse of a first polarity separated by a gap in time from a second pulse having a second polarity, opposite the first polarity. In some embodiments, the TENS is configured to output a plurality of alternating spaced biphasic electrical pulses including a plurality of pairs of pairs of pulses, each pair of pairs of pulses including a first pair having a first pulse of a first polarity separated by a gap in time from a second pulse having a second polarity, opposite the first polarity, followed by a longer gap in time by a second pair having a third pulse of the second polarity separated by a gap in time from a fourth pulse having the first polarity. In some embodiments, the TENS is configured to output a plurality of electrical, substantially square, alternating-spaced-biphasic pulses including a first plurality of pulses having a first polarity and a duration of no more than 200 microseconds and a second plurality of pulses having a second polarity, opposite the first polarity, and a duration of no more than 200 microseconds.
- In some embodiments, the present invention provides an apparatus for treating a headache of a patient, the apparatus including a portable, transcutaneous electrical nerve stimulator (TENS) having a plurality of electrodes, wherein the TENS transcutaneously presents a plurality of electrical pulses to nerves of the patient, in order to treat headache pain.
- In some embodiments, the TENS unit and the plurality of electrodes are housed in a unitary device, wherein the device has no exposed wiring, and wherein the device facilitates a self-administered treatment by the patient. In some embodiments, the TENS is configured to treat headache pain in an abortive manner. In other embodiments, the TENS is configured to treat headache pain in a preventive manner.
- In some embodiments, the TENS is a handheld device. In other embodiments, the TENS is a hands-free device.
- In some embodiments, a first plurality of electrodes is at a distance from a second plurality of electrodes, and the first plurality and the second plurality are each configured such that at least two electrodes touch the patient's skin simultaneously.
- In some embodiments, the TENS delivers pulses at one or more frequencies between about 40 Hz and about 10 kHz. In some embodiments, the plurality of electrical pulses are delivered at no more than 30 mA, and in some embodiments, electrical pulses are delivered at no more than 60 mA. In some embodiments, each one of the plurality of electrical pulses is delivered at no more than 200 volts. In some embodiments, a pulse width of each one of the plurality of electrical pulses is equal or less than 400 microseconds.
- In some embodiments, the plurality of electrical pulses stimulate at least one of the following nerve structures: the right and/or left greater occipital nerve(s), the right and/or left least (third) occipital nerve(s), the right and/or left lesser occipital nerve(s), the right and/or left great auricular nerve(s).
- In some embodiments, the apparatus further includes a conductive gel applicator that selectively dispenses gel from a reservoir within the handheld device. In some embodiments, the apparatus further includes one or more delivery channels built into at least one of the plurality of electrodes and operatively connected to the reservoir.
- In some embodiments, each one of the plurality of the electrodes are shaped and configured such that the plurality of electrodes facilitate contact between the plurality of electrodes and skin of the patient in bodily locations where hair impedes such contact. In some embodiments, each one of the plurality of electrodes has a comb-tooth shape to ensure that hair is combed out of the way as the patient moves the plurality of electrodes over the skin.
- In some embodiments, the apparatus further includes a battery electrically connected to the TENS and housed within the unitary device. In other embodiments, the apparatus further includes an external power supply electrically connected to the TENS.
- In some embodiments, each one of the plurality of electrodes is mounted in a device head that is configured to rotate to facilitate contact between the plurality of electrodes and skin of the patient.
- In other embodiments, any combination of the above-described features is implemented.
- References cited—the following Patents and Applications relate to the invention and all are incorporated herein by reference: U.S. Pat. No. 6,735,475, U.S. Pat. No. 5,078,928, U.S. Pat. No. 4,856,526, U.S. Pat. No. 4,627,438, and U.S. Patent Application Publication 2006/0173510.
- Other references are as follows:
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- 15. IANNAZZO, S., M. S. CATTARUZZA, S. DE FILIPPIS, F. ROSSI, E. PERATA, S. DI ROLLO, G. COLOPRISCO & P. MARTELLETTI; 2003; Analgesic therapy for headache: consumption, appropriateness and costs; The Journal of Headache and Pain 4: s84-s87.
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- It is to be understood that the above description is intended to be illustrative, and not restrictive. Although numerous characteristics and advantages of various embodiments as described herein have been set forth in the foregoing description, together with details of the structure and function of various embodiments, many other embodiments and changes to details will be apparent to those of skill in the art upon reviewing the above description. The scope of the invention should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. In the appended claims, the terms “including” and “in which” are used as the plain-English equivalents of the respective terms “comprising” and “wherein,” respectively. Moreover, the terms “first,” “second,” and “third,” etc., are used merely as labels, and are not intended to impose numerical requirements on their objects.
Claims (20)
1. A method for treating a headache of a patient, the method comprising:
providing a portable, transcutaneous electrical nerve stimulator (TENS) having:
a first plurality of non-invasive comb-like electrodes physically connected to a common electrode base and each electrically connected to a first signal output of the TENS, and
a second plurality of non-invasive comb-like electrodes physically connected to the common electrode base, wherein the TENS is configured such that the first plurality of electrodes and the second plurality of electrodes can be simultaneously placed in contact with the patient's head, and wherein the second plurality of electrodes each electrically connected to a second signal output of the TENS;
receiving, by the TENS, an activation indication; and
based on the activation indication, providing a plurality of electrical pulses between the first signal output of the TENS and the second signal output of the TENS such that the electrical pulses are applied from both the first plurality of electrodes and the second plurality of electrodes transcutaneously to the patient's head to stimulate nerves of the patient in order to treat headache pain.
2. The method of claim 1 , wherein the providing of the TENS includes housing the TENS and the first and second plurality of electrodes in a unitary device, and wherein the device facilitates a self-administered treatment by the patient.
3. The method of claim 1 , wherein the providing of the plurality of electrical pulses treats headache pain in an abortive manner.
4. The method of claim 1 , wherein the providing of the plurality of electrical pulses treats headache pain in a preventive manner.
5. The method of claim 1 , wherein the providing of the plurality of electrical pulses includes providing biphasic substantially square pulses including a first plurality of pulses having a first polarity and a duration of no more than 400 microseconds and a second plurality of pulses having a second polarity, opposite the first polarity, and a duration of no more than 400 microseconds.
6. The method of claim 1 , wherein the electrodes of the first plurality of electrodes are grouped into a first group, wherein the electrodes of the second plurality of electrodes are grouped into a second group, wherein the first group is located at a distance from the second group that is greater than a distance between any two adjacent electrodes in each group.
7. The method of claim 1 , wherein the providing of the plurality of electrical pulses includes providing electrical pulses having a non-zero pulse width that is equal or less than 400 microseconds.
8. The method of claim 1 , wherein the providing of the plurality of electrical pulses includes stimulating one or more of the nerve structures selected from the group consisting of the right greater occipital nerve, the left greater occipital nerve, the right least (third) occipital nerve, the left least (third) occipital nerve, the right lesser occipital nerve, the left lesser occipital nerve, the right great auricular nerve, and the left great auricular nerve.
9. The method of claim 1 , further comprising disabling power to the first and second plurality of electrodes if no pressure is applied to the head of the device, and enabling pulsed power to the first and second plurality of electrodes if pressure is applied.
10. The method of claim 1 , wherein each one of the first and second plurality of electrodes is hollow, the method further comprising:
dispensing a conductive gel through each one of the first and second plurality of hollow electrodes; and
disabling power to each one of the first and second plurality of hollow electrodes if no pressure is applied to the head of the device.
11. An apparatus for treating a headache of a patient, the apparatus comprising:
a portable, transcutaneous electrical nerve stimulator (TENS) having
a common electrode base;
a first plurality of non-invasive comb-like electrodes physically connected to the common electrode base and each electrically connected to a first signal output of the TENS, and
a second plurality of non-invasive comb-like electrodes physically connected to the common electrode base, wherein the TENS is configured such that the first plurality of electrodes and the second plurality of electrodes can be simultaneously placed in contact with the patient's head, and wherein the second plurality of electrodes are each electrically connected to a second signal output of the TENS,
wherein the TENS presents a plurality of electrical pulses between the first signal output of the TENS and the second signal output of the TENS such that the electrical pulses are applied from both the first plurality of electrodes and the second plurality of electrodes transcutaneously to the patient's head to stimulate nerves of the patient, in order to treat headache pain.
12. The apparatus of claim 11 , wherein the TENS unit and the first and second plurality of electrodes are housed in a unitary device, wherein the device has no exposed wiring, and wherein the device facilitates a self-administered treatment by the patient.
13. The apparatus of claim 11 , wherein the TENS includes a circuit configured to output a plurality of electrical biphasic substantially square pulses including a first plurality of pulses having a first polarity and a duration of no more than 400 microseconds and a second plurality of pulses having a second polarity, opposite the first polarity, and a duration of no more than 400 microseconds.
14. The apparatus of claim 11 , wherein the electrodes of the first plurality of electrodes are grouped into a first group, wherein the electrodes of the second plurality of electrodes are grouped into a second group, wherein the first group and the second group are located at a distance from one another that is greater than a distance between any two adjacent electrodes in each group.
15. The apparatus of claim 11 , further comprising a conductive gel applicator that selectively dispenses gel from a reservoir within the handheld device.
16. The apparatus of claim 15 , further comprising one or more delivery channels built into at least one of the second plurality of electrodes and operatively connected to the reservoir.
17. The apparatus of claim 11 , wherein the first and second plurality of electrodes are shaped and configured to facilitate contact between the first and second plurality of electrodes and skin of the patient in bodily locations where hair would otherwise impede such contact.
18. The apparatus of claim 11 , wherein each one of the first and second plurality of electrodes has a comb-tooth shape to ensure that hair is combed out of the way as the patient moves the plurality of electrodes over the skin.
19. The apparatus of claim 11 , wherein the device is small enough that a person can carry it around comfortably.
20. An apparatus for treating a headache of a patient, the method comprising:
a portable, transcutaneous electrical nerve stimulator (TENS) having:
a first plurality of non-invasive comb-like electrodes physically connected to a common electrode base and each electrically connected to a first signal output of the TENS, and
a second plurality of non-invasive comb-like electrodes physically connected to the common electrode base, wherein the TENS is configured such that the first plurality of electrodes and the second plurality of electrodes can be simultaneously placed in contact with the patient's head, and wherein the second plurality of electrodes each electrically connected to a second signal output of the TENS;
means for receiving, by the TENS, an activation indication; and
means, based on the activation indication, for providing a plurality of electrical pulses between the first signal output of the TENS and the second signal output of the TENS such that the electrical pulses are applied from both the first plurality of electrodes and the second plurality of electrodes transcutaneously to the patient's head to stimulate nerves of the patient in order to treat headache pain.
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US8560075B2 (en) | 2013-10-15 |
EP2136872A4 (en) | 2010-05-12 |
EP2136872A1 (en) | 2009-12-30 |
US20140236052A1 (en) | 2014-08-21 |
WO2008128215A1 (en) | 2008-10-23 |
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